Update scalafmt-core to 3.5.9

[scalameta-bot]

Updates org.scalameta:scalafmt-core from 3.5.8 to 3.5.9.
GitHub Release Notes - Version Diff

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updates.ignore = [ { groupId = "org.scalameta", artifactId = "scalafmt-core" } ]

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dependencyOverrides = [{
  pullRequests = { frequency = "@monthly" },
  dependency = { groupId = "org.scalameta", artifactId = "scalafmt-core" }
}]

labels: library-update, early-semver-patch, semver-spec-patch, commit-count:1